Demonstrators have stormed into the Legislative Council (LegCo) Secretariat of Hong Kong and vandalised the entrances after besieging the building for hours on Monday - the 22nd anniversary of the city's handover from Britain to China, South China Morning Post reported.
They have smashed glass doors and removed metal bars in a sign of protest against amendments to an extradition bill, which would allow Hong Kong to hand over suspects to any jurisdiction, including Taiwain, Macau and mainland China.
The protesters have as well sprayed the walls with graffiti, some of which reportedly read "anti-extradition law" and "it is the government that forces us to do this".
As they were storming the building, LegCo issed a red security alert and ordered an evacuation amid concerns of growing violence.
Earlier in the day, the broadcaster RTHK reported that the Hong Kong police were using batons and pepper spray to disperse demonstrators.
Mass protests erupted last month when the authorities began considering amendments to a bill to allow Hong Kong to extradite suspects to jurisdictions with which it does not have an extradition agreement. Following the rallies, the authorities have temporarily frozen the bill, while Hong Kong Chief Executive Carrie Lam has publicly apologised for the situation. The protesters, however, are pressing for the bill to be completely dropped.